<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>v-on:按键修饰符</title>
        <script src="js/vuejs-2.5.16.js"></script>
    </head>
    <body>
        <div id="app">
            Vue:<input type="text" v-on:keydown.enter="fun1">
        </div>
    </body>
    <script>
        //view model
        new Vue({
            el:"#app",
            methods:{
                fun1:function (){
                    alert("按下的是回车");
                }
            }
        });

    </script>
</html>